Catalyst‐Controlled Regiodivergent Synthesis of α/β‐Dipeptide Derivatives via
<i>N</i>
‐Allylic Alkylation of
<i>O‐</i>
Alkyl Hydroxamates with MBH Carbonates
A catalyst-controlled switchable N-allylic reaction of O-alkyl hydroxamates with MBH carbonates is reported, providing a regiodivergent method for α/β-dipeptides derivatives.
A novel method to synthesize isoquinolones via oxidative annulation of N‐alkoxy benzamides and alkynes using binaphthyl‐stabilized palladium nanoparticles (Pd‐BNP) as catalyst has been developed. This methodology affords various isoquinolone derivatives in good to excellent yields with high regioselectivities in the presence of air as oxidant. N‐Methoxybenzothioamide was also found to undergo oxidative
Design, synthesis and utilization of a novel coupling reagent for the preparation of O-alkyl hydroxamic acids
作者:Nagnnath D. Kokare、Rahul R. Nagawade、Vipul P. Rane、Devanand B. Shinde
DOI:10.1016/j.tetlet.2007.04.058
日期:2007.6
An efficient novel reagent, phosphoric acid diethyl ester 2-phenyl-benzimidazol-1-yl ester, was designed, and synthesized and its applicability was demonstrated for the preparation of O-alkyl hydroxamic acids. The O-alkyl hydroxamic acids of N-protectedaminoacids were also synthesized. The enantiomeric purity of the synthesized compounds were measured using chiral HPLC and the degree of racemization
<i>N</i>-[(Diphenoxyphosphoryl)oxy]-2-phenyl-1<i>H</i>-benzimidazole as a versatile reagent for synthesis<i>O</i>-alkylhydroxamic acids
作者:Nagnnath D. Kokare、Devanand B. Shinde
DOI:10.1002/jhet.5570450406
日期:2008.7
Highly efficient reagent, N-[(diphenoxyphosphoryl)oxy]-2-phenyl-1H-benzimidazole was synthesized and its applicability was demonstrated for the synthesis of O-alkyl hydroxamic acids. The efficiency of the reagent was evaluated through the synthesis of range of O-alkyl hydroxamic acids from aromatic carboxylic acids as well as N-protected amino acids. The enatiomeric purity of synthesized compounds
Abstract Treatment of O‐alkylhydroxylamine hydrochlorides with 2‐acyl‐4,5‐dichloropyridazin‐3(2H)‐ones in the presence of triethylamine or Amberlite® IRA‐67 in acetonitrile gave corresponding O‐alkylhydroxamic acid derivatives in excellent yields. This is an efficient, convenient, and eco‐friendly method.